Isn’t the answer infinity? We don’t know what’s beyond observed part of universe, and there’s infinity number of universes. If our emerged then there’s others.
Our universe is finite, so although it is unbounded (lacks edges) there aren't an infinite number of anything in it, galaxies, stars, M&Ms, grains of sand, atoms of hydrogen all finite.
There is no evidence that there are a infinite number of universes. All we know of is the one we exist in. The many worlds interpretation of quantum mechanics posits that there are a very large number of non-interacting "worlds" which may or may not be the same as "universes".
And if you meant "infinity number of galaxies" then that would require an infinite-size universe, and we don't know if that is the case for our universe. It could be, or it could be finite but unbounded.
If you were observer of emptiness and no universe or anything existing then you would say it’s more likely there will be nothing, so probability towards zero.
Not to forget the recursion. There’s likely universes within our elementary particles or our universe is a particle in parent one.
This is a very nonstandard use of the word "likely".
You have so little information that any estimate is effectively arbitrary. Nonetheless I think there's a clear statistical bias between the two choices in both cases.